Concrete-mixer.



M. 00mm. CONCRETE MIXER.

APPLICATION FILED APR. 20, 1903.

1,003,400... Patented Sept. 12,1911.

2 SHEETSSKEET 1.

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M. C(JNROY.

concurs MIXER.

APPLICATION FILED APR. 20, 1908. V

' Patented Sept. 12, 1911 2 SHEETSSHEET 2.

3 wow doc 2X '1 bM-ceac s llti HARGEE, -65? SHERIBAN, IMEIGHL ocated Specification of Letters Patent.

Application filed. April 20, recs.

Patented Sept. fl 2.. llriil.

Serial to. resist.

To all whom it may concern:

Be it known that l, hili'oiiAEL Connor a citizen of the United States of America, residing at lonia, in the county of lonia and State of Michigan, have invented certain new and useful Improvements in Concrete- Mixers; and I do hereby declare the fol lowing to be a full, clear, and exact description of the invention, suchas will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in mortar mixers, and its object is to provide a simple easily operated device, and to provide the same with various new and useful. features hereinafter more fully described and particularly pointed out in the claims.

My device consists essentially of a dry mixer, a funnel below the dry mixer to receive the mixed material; means for supplying water to the surface of the funnel to. moisten the dry material; a conveyer below the funnel and adapted to further mix the material and discharge the same from the machine and means for transmitting motion to the various parts, as will more fully appear by reference to the accompanying drawings in which:

Figure 1, is aside elevation of a de-v vice embodying my invention; Fig. 2. a vertical section of the same on the line 22 of Fig. 1.; and, Fig. 3 asectional detail at right-angles to Fig. 2.

Like numbers refer to like parts in all of the figures.

1 represents a hopper to receive the sand and 2 a similar hopper to receive the cement, said hoppers being separated by a vertical partition, at the respective sides of which are the rotary feed regulators 8 and 9 mounted on shafts 8 and 9 partially inclosed at their outer sides by concave extensions of the respective hoppers whereby material is directed into the downwardly turning sides of the regulators only, thus aiding in rotating the same. I

5 is a driving shaft mounted above the partition between the hoppers and spaced apart therefrom, 011 which shaft are mounted radial slotted arms 6 adjustably support ing buckets 7 into which the sand is discharged from'a spout 3 located at an elevation above the sand hopper and adjusted to direct the sand into the descending buckets.

This device thus serves driving, vvbeel operated by the weight of the sand it is discharged from the spout 3.

thus furnishing motive power to operate the machine are discharged from these feed regulators through a single opening be low the regulators. If found necessary the spouts 3 and t may be extended upward and the sand and cementthns given increased momentum to increase the power delivered thereby. is a truncated conical shield below this discharge opening tl'irough which extends a vertical shaft 23 ournaled at its upper end in the partition between the hop pers and also ournaled in a bearing beneath the shield 25. A shaft 10 extends hori- Zontally from near the shaft 23 outward and is connected to the shaft 23 by bevel gears 10 to rotate said shaft. Concentric with this shaft 23 is a tube or drum 26 supported thereby. and connected thereto by radial arms 27, a portion only of which are shown. These arms serve also as heaters to effect-ually mix the nlaterial passing downward through the tube. Beneath the tube 26 is a funnel 28 into which the mixed dry material is discharged. Above the rim of this funnel and adapted to discharge numerous tine streams of water upon the inside surface of the funnel is a hollow ring 29 connected by a pipe 30 to any suitable water supply. Beneath the funnel is a conveyor trough 31 extending outside the machine in which is a conveyer screw llto mix and remove the wet material from the machine.

To communicate motion from the driving shaft 5 to the shafts 8, 9, 10 and 11, I provide a sprocket wheel 12 on the 'driving shaft 5 connected by a chain 18 to a similar wheel 13 on the shaft 9, and connect the shaft 9 and the shaft- 8 by a gear 21 and pinion 22, which gear and pinion li prefer to make changeable to vary the relative speed of the feed regulators to adiust the proportion of sand andcement; The feed The sand is discharged from these buckets into the hop end of the regulator shafts instead of, as

shownto more convenientl change the same.

To trahsmit motion from the shaft 51 to the shafts 10- and 11 a sprocket wheel 14 is mounted on-the shaft 9 and connected by a chain 19 to a wheel 15 on the shaft 10 and the shafts 10 and 11 are connected by means of sprocket wheels 16 and 17 and a chain 20. Above the shield 25, I attach a sweep 24:..to the shaft 23 to remove the material falling upon the closed top of ,the shield, and push the same over the outer angle thereof. This material escaping from the shield,which is smaller in diameter than the interior of the tube 26, first impinges upon the inner surface of the tube and thence rebounding inward is broken up, scattered and mixed by the revolving arms 21 as it passes downwardly, so that when it I re aches the funnel 28, it is thoroughly commingled ready for mixing with the water discharged from the ring 29. This water flowing down over the inner surface of the funnel is quickly distributed and mingled with the material which escapes from the lower end of. the tube 26. The centrifugal action of thisdry mixer discharges this material from the lower end of the tube u on the upper part of the funnel, down whio it flows together with the fine streams of water discharged from the ring 29 and thus little further mixing to constitute properly mixed mortar for concrete work.

What I claim is:

1. A concrete mixer comprising a vertically disposed shaft, a tube surrounding the shaft, radial arms connecting the shaft and tubeya shield surrounding the shaft above said tube, a horizontally disposed shaft extending outward from beneath the shield, gears beneath the shield connecting said shafts, a funnel below the tube and shaft,

,means'i 'or supplying a spray of water to the upper part of the funnel, a conveyer below the funnel and means for communicating motion to the horizontal shaft and to the conveyer.

2. A concrete mixer, comprisin a vertical shaft, a truncated conical shie d having a flat top closure through which the shaft extends, a sweep on the shaft traversing the said top, a tube surrounding the shaft and of gre ter diameter than the shield, arms connecting the tube and shaft, a funnel below the tube and shaft, means for supplying a spray of water to the funnel, a conveyer below the funnel, a horizontal shaft extending beneath the shield, gears beneath the shield connecting the said shafts and means for rotating the shafts and conveyer.

In testimony whereof I afiix my signature in presence of two witnesses.

MICHAEL CONROY. 

